参数资料
型号: MC9328MX1DVM20R2
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 200 MHz, RISC PROCESSOR, PBGA256
封装: 14 X 14 MM, 1.30 MM HEIGHT, 0.80 MM PITCH, MAPBGA-256
文件页数: 77/94页
文件大小: 1487K
代理商: MC9328MX1DVM20R2
Specifications
MOTOROLA
MC9328MX1 Advance Information
79
3.19 I2C Module
The I2C communication protocol consists of seven elements: START, Data Source/Recipient, Data
Direction, Slave Acknowledge, Data, Data Acknowledge, and STOP.
Figure 63. Definition of Bus Timing for I2C
3.20 Synchronous Serial Interface
The MC9328MX1 processor contains two identical SSI modules. The transmit and receive sections of the
SSI can be synchronous or asynchronous. In synchronous mode, the transmitter and the receiver use a
common clock and frame synchronization signal. In asynchronous mode, the transmitter and receiver each
have their own clock and frame synchronization signals. Continuous or gated clock mode can be selected.
In continuous mode, the clock runs continuously. In gated clock mode, the clock functions only during
transmission. The internal and external clock timing diagrams are shown in Figure 65 through Figure 67
Normal or network mode can also be selected. In normal mode, the SSI functions with one data word of
I/O per frame. In network mode, a frame can contain between 2 and 32 data words. Network mode is
typically used in star or ring-time division multiplex networks with other processors or codecs, allowing
interface to time division multiplexed networks without additional logic. Use of the gated clock is not
allowed in network mode. These distinctions result in the basic operating modes that allow the SSI to
communicate with a wide variety of devices.
Table 39. I2C Bus Timing Parameter Table
Ref
No.
Parameter
1.8V +/- 0.10V
3.0V +/- 0.30V
Unit
Minimum
Maximum
Minimum
Maximum
1
Hold time (repeated) START condition
182
160
ns
2
Data hold time
01710150
ns
3
Data setup time
11.4
10
ns
4
HIGH period of the SCL clock
80
120
ns
5
LOW period of the SCL clock
480
320
ns
6
Setup time for STOP condition
182.4
160
ns
SDA
SCL
1
2
3
4
6
5
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